Signal acquiring method of GPS receiver and digital camera thereof

Abstract

A signal acquiring method of a GPS receiver and a digital camera thereof, suitable for accelerating a signal acquiring speed of the GPS receiver, are described. The signal acquiring method includes the following steps receiving a plurality of satellite signals; performing a discrete cosine transform (DCT) demodulation procedure, so as to parse a receiving time base of the satellite signals; next, transforming the satellite signals into a code information and a navigation frequency according to the receiving time base of the satellite signals; then, performing a correlation correction procedure to acquire a navigation information from the satellite signals according to the code information and the navigation frequency; which thus accelerates the processing speed on the signal acquiring flow through calculation characteristics of the DCT.

1. A digital camera provided with a signal acquiring process of a GPS, for accelerating a signal acquiring speed of the GPS receiver, comprising:
 a photographing module, for receiving a plurality of image data; 
 a DCT module, electrically connected to the photographing module, and used to perform an image compression on the image data received by the photographing module, thereby generating a corresponding compressed image; 
 a GPS receiver, for receiving a plurality of satellite signals; and 
 an arithmetic unit, electrically connected to the DCT module and the GPS receiver, and used to perform a signal demodulation on the satellite signals, thereby parsing a receiving time base of the satellite signals and acquiring a navigation information from the satellite signals. 
 
     
     
       2. The digital camera provided with a signal acquiring process of a GPS as claimed in  claim 1 , wherein the GPS receiver further comprises:
 an antenna, for receiving the satellite signals; 
 a radio frequency (RF) front end, electrically connected to the antenna, and used to perform filtering and signal amplifying on the satellite signals; 
 a frequency synthesizer, electrically connected to the RF front end; 
 a reference oscillator, electrically connected to the frequency synthesizer, and provided for the frequency synthesizer to generate a carrier wave to the RF front end, so as to perform a wave mixing process; and 
 an analog-to-digital converter, electrically connected to the RF front end, and used to convert analog signals into digital signals.